Phylum Mollusca Linnaeus, 1758 - molluscs
   Class Gastropoda Cuvier, 1795 - snails and slugs
     Subclass Gymnomorpha Salvini-Plawen, 1970 see Subclass Pulmonata Cuvier, 1814
       Order Onchidiida Solem, 1959 [monotypic]
         Superfamily Onchidioidea Rafinesque, 1815 [monotypic]
           Family Onchidiidae Rafinesque, 1815
             Genus Labella Vaught, 1989, orth. inval. see Genus Labbella Starobogatov, 1970